Taxon Report

Tonestus peirsonii (Keck) G. Nesom & R. Morgan

Peirson's tonestus

Print Report

Classification


Scientific Name:	Tonestus peirsonii (Keck) G. Nesom & R. Morgan
Common Name:	Peirson's tonestus
Family:	Asteraceae
Element Code:	PDASTE0070
USDA Plants Symbol:	TOPE
Synonyms/Other Names:	Haplopappus peirsonii (Keck) J.T. Howell

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Jul-Aug	Jul-Aug
Elevation:	2900-3700 (9515-12140)
General Habitats:	Alpine boulder and rock field, Subalpine coniferous forest
Microhabitat:	Granitic
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	4.3
Global Rank:	G3
State Rank:	S3
State List:	None
Fed List:	None
Other Status:
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	0
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	0

Location


California Endemic: True
California Counties and Islands: Name (Code)
Fresno (FRE), Inyo (INY)
Quads: Name (Quad Code)
Mount Tom (3711836), Mt. Darwin (3711826), North Palisade (3711815)

Threat List Data from the CNDDB


Threat List Total:	0
EOs with Threat Listed:	Total EOs	% of EOs
	0	0 %

Notes



See Madroño 5(5):169 (1940) for original description, and Phytologia 68(3):178 (1990) for revised nomenclature.
Threats:

Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 4 January 2025].